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Subject: Re: query
From: Glendon (glendonJLM@XXX.XXX)
Date: Wed Aug 21 2002 - 19:06:47 EDT
Oh, I forgot, that site also has Vincenty's method in downloadable Excel
Spreadsheet form...see, http://www.auslig.gov.au/geodesy/datums/calcs.htm
while I haven't looked, the formulae must be embedded in the spreadsheet
cells.
As other posters have noted, Vincenty's method is a bit of overkill in terms
of accuracy required for navigational problems
Lee Martin
----- Original Message -----
From: "Glendon" <glendonJLM@XXX.XXX>
To: <NAVIGATION-L@XXX.XXX>
Sent: Thursday, August 22, 2002 8:43 AM
Subject: Re: query
> As Vic Fraenckel has noted, Vincenty's formula, direct method, will
provide
> an ellipsoidal solution to your problem. For an online application of
> Vincent's formula and reference to his original article, go to
> http://www.auslig.gov.au/geodesy/datums/vincenty_direct.htm
> ----- Original Message -----
> From: "Mitch B Burrill" <MBurrill@XXX.XXX>
> To: <NAVIGATION-L@XXX.XXX>
> Sent: Thursday, August 22, 2002 4:54 AM
> Subject: Re: query
>
>
> > Thanks Michael,
> > It would be constant TC. Sorry, but I only discovered what a rhumb
course
> was a few hours ago.
> > I am rapidly becoming obsessed with navigation !
> >
> > Mitch
> >
> > Mitch Burrill
> > mburrill@XXX.XXX
> >
> > -----Original Message-----
> > From: Michael Wescott [mailto:wescott_mike@XXX.XXX]
> > Sent: Wednesday, August 21, 2002 2:43 PM
> > To: NAVIGATION-L@XXX.XXX
> > Subject: Re: query
> >
> > Mitch B Burrill writes:
> > > If I am at lat1, long1, and go XXX nm at TC YYY, What is the exact
> > > formula from spherical trigonometry to get lat2, long2 ?
> >
> > I would argue that the problem is not sufficiently well specified.
> >
> > Is TC=YYY merely the initial course for a Great Circle trip during
> > which the course will generally vary as the trip progresses. Or is TC
> > to remain constant for the whole trip, i.e. a rhumb line course? Or
> > something else altogether?
> >
> > --
> > Mike Wescott
> > Wescott_Mike@XXX.XXX
>
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